A Model for the Prediction of Droplet Size in Pickering Emulsions Stabilized by Oppositely Charged Particles

Langmuir ◽  
2014 ◽  
Vol 30 (31) ◽  
pp. 9336-9345 ◽  
Author(s):  
Trivikram Nallamilli ◽  
Ethayaraja Mani ◽  
Madivala G. Basavaraj
Keyword(s):  
Droplet Size ◽  
Charged Particles ◽  
Pickering Emulsions ◽  
Oppositely Charged

scholarly journals In situ Fabrication of Multi-Walled Carbon Nanotubes/Silica Hybrid Colloidosomes by Pickering Emulsion Templating Using Trialkoxysilanes of Opposite Polarity

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1480 ◽  
Author(s):  
Grzegorzewski ◽  
Benhaim ◽  
Alkotzer ◽  
Zelinger ◽  
Yaakov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silica Nanoparticles ◽  
Droplet Size ◽  
Opposite Polarity ◽  
Pickering Emulsions ◽  
Volume Percentage ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Emulsion Templating ◽  
Silica Hybrid

A simple and effective way to prepare multi-walled carbon nanotubes (MWNT)//silica hybrid microcapsules (colloidosomes) is presented. These microcapsules have been generated by emulsion templating in a biphasic oil-in-water (o/w) system. Two trialkoxysilanes of complementary polarity, (3-aminopropyl)triethoxysilane (APTES) and dodecyltriethoxysilane (DTES), were used to chemically immobilize the silica nanoparticles at the o/w interface and stabilize the as-generated Pickering emulsions. The effects of varying the o/w ratio and the concentration of the added solids on the type of emulsion formed, the oil droplet size, as well as the emulsion stability have been investigated. The emulsion phase fraction was dependent on the silica content while the droplet size increased with increasing oil volume percentage. A solid shell emerged around the oil droplets from copolymerization between silane monomers. The thickness of the resulting shells was several hundreds of nm. Although MWNTs and silica nanoparticles both were co-assembled at the o/w interface, silica has shown to be the sole stabilizer, with APTES being crucial for the formation of the shell structure. Drop-casting of the emulsion and air-drying led to hierarchical open porous MWNT-silica nanocomposites. These new structures are promising as electrically conductive thin films for variety of applications, such as electro-optics, encapsulation, or chemical sensing.

Preparation of a synergistically stabilized oil-in-water paraffin Pickering emulsion for potential application in wood treatment

Holzforschung ◽  
2018 ◽  
Vol 72 (6) ◽  
pp. 489-497 ◽  
Author(s):  
Jun Jiang ◽  
Jinzhen Cao ◽  
Wang Wang ◽  
Haiying Shen
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
Size Distribution ◽  
Droplet Size ◽  
Surface Hardness ◽  
Pickering Emulsion ◽  
Silica Particles ◽  
Morphological Properties ◽  
Pickering Emulsions ◽  
Oil In Water

AbstractPickering emulsions (emulsions stabilized by solid-state additives) are attractive as they have strong similarities with traditional surfactant-based emulsions. In this study, an oil-in-water (O/W) paraffin Pickering emulsion system with satisfying stability and small droplet size distribution was developed by hydrophilic silica particles and traditional surfactants as mixed emulsifiers. The droplet morphology and size distribution were observed by optical microscopy and a laser particle analyzer. The emulsion stability was improved and the droplet size was reduced after addition of a suitable amount of silica particles. The silica concentration of 1% showed the optimal effect among all the levels observed (0.1, 0.5, 1 and 2%). Wood was impregnated with the prepared emulsion, and the chemical and morphological properties of the product were investigated by Fourier-transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) combined with energy-dispersed X-ray analysis (SEM-EDXA). Moreover, the hydrophobicity, thermal properties, surface hardness, axial compression strength (CS) and dynamic mechanical properties were tested. The silica was evenly distributed in the wood cell wall and thus there was a synergistic positive effect from the paraffin and silica in the cell wall leading to better hydrophobicity, improved surface hardness and mechanical properties including the thermal stability.

Self-assembly of oppositely charged particles in dilute ceramic suspensions: predictive role of simulations

Soft Matter ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 370-382 ◽  
Author(s):  
M. Cerbelaud ◽  
A. Videcoq ◽  
P. Abélard ◽  
C. Pagnoux ◽  
F. Rossignol ◽  
...  
Keyword(s):  
Self Assembly ◽  
Charged Particles ◽  
Predictive Role ◽  
Ceramic Suspensions ◽  
Oppositely Charged

scholarly journals Carbon ceramic nanoparticulate film electrode prepared from oppositely charged particles by layer-by-layer approach

2010 ◽  
Vol 12 (1) ◽  
pp. 83-85 ◽  
Author(s):  
Adam Lesniewski ◽  
Joanna Niedziolka-Jonsson ◽  
Cecile Rizzi ◽  
Laurent Gaillon ◽  
Jerzy Rogalski ◽  
...  
Keyword(s):  
Charged Particles ◽  
Layer By Layer ◽  
Film Electrode ◽  
Carbon Ceramic ◽  
Oppositely Charged ◽  
Nanoparticulate Film

Investigating forces between charged particles in the presence of oppositely charged polyelectrolytes with the multi-particle colloidal probe technique

2012 ◽  
Vol 179-182 ◽  
pp. 85-98 ◽  
Author(s):  
Michal Borkovec ◽  
Istvan Szilagyi ◽  
Ionel Popa ◽  
Marco Finessi ◽  
Prashant Sinha ◽  
...  
Keyword(s):  
Charged Particles ◽  
Probe Technique ◽  
Colloidal Probe ◽  
Oppositely Charged
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